沁水盆地南部太原组泥岩裂缝发育特征及层厚控制下的裂隙介质逾渗规律探究  

Theoretical study on the percolation of shale fractured medium under the control of layer thickness in Southern Qinshui Basin

作　　者：付常青[1] 刘成[2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]中海油能源发展股份有限公司工程技术分公司非常规技术研究院,天津300452

出　　处：《世界有色金属》2017年第3期241-242,共2页World Nonferrous Metals

摘　　要：页岩气储层评价中,研究页岩厚度影响下的裂隙的发育特征对于了解页岩气的储运特征具有重要的意义。在对沁水盆地南部太原组页岩裂隙的统计和研究基础之上,基于逾渗理论,结合页岩裂隙的发育规律,建立了页岩裂隙介质的逾渗模型。结果表明沁水盆地南部太原组页岩裂隙密度与页岩层厚之间呈负指数相关;太原组页岩逾渗概率受页岩层厚与页岩裂隙分形维数的控制。当页岩厚度小于临界厚度,裂隙分形维数大于临界分形维数时,页岩逾渗概率快速增大,发生逾渗转变。同时给出了页岩裂隙逾渗阈值的H-D临界曲线,揭示了页岩裂隙介质的逾渗规律。In the evaluation of shale gas reservoir,the characteristics of the fracture are important for the storage and transportation of shale gas.Based on the statistics of Taiyuan formation shale fractured medium in Southern Qinshui Basin,according to the percolation theory,combined with the statistical law of shale fracture,set up the model of shale fractured medium.Results show that the shale fracture density is negatively correlated with the thickness of shale;Taiyuan formation shale percolation probability is controlled by the fractal dimension of the thickness of shale and the fracture fractal dimension.the decrease of shale thickness and the increase of shale fracture fractal dimension increased shale percolation probability.The fracture of percolation threshold of critical H-D curve was draw and shale fractured medium percolation law is revealed.

关 键 词：页岩厚度 裂隙 分形 逾渗概率 

分 类 号：P618.13[天文地球—矿床学]